National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

80°F

27°C

Humidity 71%
Wind Speed SE 9 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 24 Mar 1:53 pm EDT
Extended Forecast for

Marathon FL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. Southeast wind around 10 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 73. East wind around 5 mph.

    Low: 73 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers. Partly sunny, with a high near 81. East wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 71. Northeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Mostly sunny, with a high near 80. North wind around 5 mph. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly clear, with a low around 70. Chance of precipitation is 10%.

    Low: 70 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly clear, with a low around 71. Windy. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers and
    Windy

  • Friday

    Friday: A slight chance of showers. Mostly sunny, with a high near 79. Windy. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers and
    Windy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. Southeast wind around 10 mph.
Tonight
Mostly cloudy, with a low around 73. East wind around 5 mph.
Tuesday
A slight chance of showers. Partly sunny, with a high near 81. East wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 71. Northeast wind around 5 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 80. North wind around 5 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 70. Chance of precipitation is 10%.
Thursday
Sunny, with a high near 79.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 71. Windy. Chance of precipitation is 10%.
Friday
A slight chance of showers. Mostly sunny, with a high near 79. Windy. Chance of precipitation is 10%.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 72. Windy. Chance of precipitation is 10%.
Saturday
A slight chance of showers. Partly sunny, with a high near 80. Breezy. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Click Map For Forecast
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
1:49 pm EDT Mar 24, 2025
Forecast Valid:
2pm EDT Mar 24, 2025-6pm EDT Mar 30, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation